ERA5 almanac comparison — 8 years of real data
Outer Banks vs Tulum: weather in December
Tulum edges out Outer Banks for sun in December: 21% clear historically versus 0% (8-year ERA5 average, a 21-point gap). Tulum also sees measurably more rain than Outer Banks this month (49% vs 27% of days). Both are viable — Tulum is the safer bet.
Outer Banks
NC
- Clear days, December
- 0%
- Sample size
- n=248 days
- Avg high
- 57°F
- Early December (1st–15th)
- 0%
- Late December (16th–end)
- 0%
- Rain frequency
- 27% of days
Tulum
Mexico
- Clear days, December
- 21%
- Sample size
- n=248 days
- Avg high
- 81°F
- Early December (1st–15th)
- 21%
- Late December (16th–end)
- 21%
- Rain frequency
- 49% of days
Frequently asked
Is Outer Banks or Tulum warmer in December?
Tulum runs warmer by day in December. Outer Banks averages highs of 57°F (highs n=248 days); Tulum averages highs of 81°F (highs n=248 days) (ERA5 2018–2025). Historical averages, not a forecast.
Does it rain more in Outer Banks or Tulum in December?
Tulum is measurably wetter than Outer Banks. Days with measurable rain: Outer Banks 27%, Tulum 49% (n=248 and n=248 days). ERA5 2018–2025; historical, not a forecast.
Which is sunnier in December, Outer Banks or Tulum?
Tulum edges out Outer Banks for sun in December: 21% clear historically versus 0% (8-year ERA5 average, a 21-point gap). Tulum also sees measurably more rain than Outer Banks this month (49% vs 27% of days). Both are viable — Tulum is the safer bet.
Compare Outer Banks vs Tulum in another month
All percentages are historical averages from the ERA5 reanalysis via Open-Meteo, 8 full years (2018–2025). “Clear” means avg high ≥ 72 °F, precipitation < 1 mm, and a non-precipitation weather code. This is history, not a forecast. The live forecast for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.